docs: def createSpatialAnchorFromDescriptor(self, pchDescriptor):
          """
          Returns a handle for an spatial anchor described by "descriptor".  On success, pHandle
          will contain a handle valid for this session.  Caller can wait for an event or occasionally
          poll GetSpatialAnchorPose() to find the virtual coordinate associated with this anchor.
          """
  
          fn = self.function_table.createSpatialAnchorFromDescriptor
          pHandleOut = SpatialAnchorHandle_t()
          result = fn(pchDescriptor, byref(pHandleOut))
          return result, pHandleOut